Robust UDE controller for energy storage application

In this paper, a design of linear robust control theory is presented, the control method is based on uncertainty and disturbance estimator (UDE), first the control approach is presented, than it applied to output power loop of bi-directional non-inverting buck-boost (BDNIBB) converter, the controller is capable of transfer energy from micro grid to storage element and vice versa. The controller compels the converter to preserve nearly nominal performance through the whole operation range by rapidly estimation and canceling the uncertainties and external disturbance. The revealed findings are supported by simulations and experiments.